CN105556220A - Refrigeration circuit with heat recovery module - Google Patents
Refrigeration circuit with heat recovery module Download PDFInfo
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- CN105556220A CN105556220A CN201380079723.9A CN201380079723A CN105556220A CN 105556220 A CN105556220 A CN 105556220A CN 201380079723 A CN201380079723 A CN 201380079723A CN 105556220 A CN105556220 A CN 105556220A
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- gas
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- refrigerant
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- separation device
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- 238000011084 recovery Methods 0.000 title claims abstract description 43
- 238000005057 refrigeration Methods 0.000 title claims abstract 14
- 239000007789 gas Substances 0.000 claims abstract description 131
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 239000003507 refrigerant Substances 0.000 claims abstract description 51
- 239000007791 liquid phase Substances 0.000 claims abstract description 10
- 239000007792 gaseous phase Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 230000005494 condensation Effects 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000006200 vaporizer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/027—Condenser control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/16—Receivers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/05—Refrigerant levels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2519—On-off valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/04—Refrigerant level
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention provides a refrigeration circuit with a heat recovery module. The refrigeration circuit (1) configured for circulating a refrigerant comprises in the direction of flow of the refrigerant: at least one compressor (2a, 2b, 2c, 2d); at least one heat recovery heat exchanger (4); at least one gas cooler/condenser (10); at least one evaporator associated expansion device (18); at least one receiver (14); and at least one evaporator (20). The refrigeration circuit (1) further comprises a gas/liquid separator (8) having a refrigerant inlet line (7) fluidly connected to an outlet-side of the at least one heat recovery heat exchanger (4); an gaseous phase outlet line (9) fluidly connected to an inlet side of the at least one gas cooler/condenser (10); and an liquid phase outlet line (13) fluidly connected to the receiver (14).
Description
The refrigerating circuit that the flow direction of circulating refrigerant comprises compressor, gas cooler/condenser, expansion gear and evaporimeter is known under prior art development level.It is also known that provide heat recovery module to reclaim at least some in the energy for compressing cold-producing medium and heat in refrigerating circuit.
From thermodynamic (al) viewpoint, this type of heat recovery module is applicable to scope (high-temperature heating, the low-temperature heat of non-constant width under maximum performance ...).Because the applicability of wide region needs many different parts, especially deposit in case the heat exchanger of the different size for the heat exchange between circulating refrigerant and outside heat recovery fluid used in described module (such as, brazing plate type heat exchanger " BPHE "), described module is very expensive, sometimes too expensive for the customer.
Therefore, will it is beneficial that, the cooling system with cheap heat recovery module is provided, described heat recovery module only comprises single heat exchanger instead of two or even more heat exchangers, allow to adjust the heat trnasfer provided by heat recovery module as in common wide region module simultaneously, which avoid the problem relevant to only using single heat exchanger, there is the problem of partial condensation in the exit that described problem can be included in heat recovery module.
According to being arranged to of exemplary of the present invention, the refrigerating circuit of refrigerant circulation is comprised on the flow direction of cold-producing medium: at least one compressor; At least one heat recovery heat exchanger; Gas/liquid separation device; At least one gas cooler/condenser; At least one receiver; And at least one evaporimeter, the expansion gear of wherein evaporimeter association is fluidly connected at least one vaporizer upstream described.Gas/liquid separation device comprises: refrigerant inlet, and it is fluidly connected to the outlet side of at least one heat recovery exchanger; Gaseous phase outlet, it is fluidly connected to the entrance side of at least one gas cooler/condenser; And liquid-phase outlet, it is fluidly connected to receiver.
The illustrative methods of operations according to the instant invention refrigerating circuit comprises the following steps:
Cold-producing medium is compressed;
Heat exchange between the cold-producing medium of compression and outside heat recovery fluid is provided;
The cold-producing medium of compression is divided into gas componant and liquid component, and wherein gas componant is cooled by gas and/or condensation and be delivered in receiver; And liquid component is being cooled by gas and/or is directly being delivered in receiver before condensation; And
The liquefied refrigerant obtained from receiver is made to expand and evaporate.
Replace as two or even more BPHE in common wide region module, according to method and the single BPHE of refrigerating circuit permission use of exemplary of the present invention, be combined with constant speed pump and make external heat reclaim fluid circuit to flow through BPHE, to consider the needs of the heat recovery module to more cheap pattern.
When only use has the single heat exchanger of constant thermal heat transfer capability, the cold-producing medium through heat exchange module may take part of the condensate.But, gas/liquid separation according to the present invention reliably avoid the problem relevant to the refriger-ant section condensation in heat recovery heat exchanger or its downstream, because according to exemplary of the present invention, the liquid component of cold-producing medium is separated with gas componant and walks around gas cooler/condenser and is directly delivered to receiver.Particularly, the cold-producing medium which avoid condensation is delivered in gas cooler/condenser, otherwise it will reduce the performance of gas cooler/condenser.This further avoid the needs at horizontal plane place liquid refrigerant being risen to condenser/gas cooler, and described condenser/gas cooler may be provided in the horizontal plane place of the horizontal plane being significantly higher than compressor and heat recovery module.
Referring to accompanying drawing, exemplary of the present invention is described in detail more, in the accompanying drawings:
Fig. 1 illustrates the schematic diagram comprising the cooling system of refrigerating circuit according to an exemplary of the present invention; And
Fig. 2 illustrates the zoomed-in view of the gas/liquid separation device be included in the cooling system shown in Fig. 1.
Fig. 1 illustrates the schematic diagram of the exemplary of the cooling system with refrigerating circuit 1, at cold-producing medium, (it, at refrigerating circuit 1 Inner eycle, flow direction as indicated by arrow) comprises: the group 2 of compressor 2a, 2b, 2c, 2d of being connected in parallel with each other in described refrigerating circuit 1; Heat recovery heat exchanger 4; Gas/liquid separation device 8; Gas cooler or condenser 10; High pressure expansion gear 12, it is configured to make cold-producing medium from high pressure to low middle compression swelling; Receiver (coolant collector) 14; Optional flash gas heat exchanger 16; The expansion gear 18 of evaporimeter association, it is configured to make cold-producing medium therefrom be pressed onto inflated with low pressure; And evaporimeter 20.The outlet side of evaporimeter 20 is fluidly connected to suction (entrance) side of compressor 2a, 2b, 2c, 2d, thus completes refrigerant circulation.
Therefore, the compound expansion of the expand continuously that the one stage of compression that the exemplary of the refrigerating circuit 1 shown in Fig. 1 have employed compressor 2a, 2b, 2c, 2d realization by being connected in parallel is realized with the expansion gear 18 associated with evaporimeter subsequently by high pressure expansion gear 12.This compound expansion is particularly at use CO
2adopt as during cold-producing medium.But, the person skilled in the art will easily understand, the present invention also can be applicable to such refrigerating circuit 1: it adopts the single-stage expansion by means of only expansion gear 18 realization of the evaporimeter association being arranged in evaporimeter 20 upstream and wherein eliminates high pressure expansion gear 12.
The upper part 14a of receiver 14 is fluidly connected to the entrance side of compressor 2a, 2b, 2c, 2d by optional flash gas shunting (tapping) pipeline 21, thus allows the flash gas be gathered in the upper part 14a of receiver 14 to walk around evaporimeter 20.Flash gas expansion gear 22 is arranged in flash gas bypass line 21, to make the flash gas sent from receiver 14 expand.Optional flash gas heat exchanger 16 is provided in described flash gas expansion gear 22 downstream, so that by cooling the flash gas of expansion with the heat exchange of the cold-producing medium being fed to the expansion gear 18 that evaporimeter associates from receiver 14.
Although the exemplary shown in Fig. 1 only comprises corresponding single gas cooler/condenser 10, single middle pressure valve 18 and single evaporimeter 20, but it will be apparent to those skilled in the art that can by be correspondingly connected in parallel each other each described in parts 10,18,20 provide multiple to provide condensation and/or the cooling capacity of enhancing.In this case, extra switchable valve can be provided, one or more with what allow optionally to start and stop in multiple described parts, thus adjust condensation and/or cooling capacity according to actual needs.
Similarly, replace the group 2 of multiple compressor 2a, 2b, 2c, 2d as shown in Figure 1, can only provide single compressor.At least one in described single compressor or multiple compressor 2a, 2b, 2c, 2d can be variable speed compressor, thus allows to control by the speed controlling described compressor the cooling capacity that provided by refrigerating circuit 1.
In operation, the compressed refrigerant leaving the group 2 of compressor 2a, 2b, 2c, 2d through the refrigerant loop side 4a of heat recovery heat exchanger 4 the heat trnasfer from cold-producing medium is given at heat recovery fluid loop 6 Inner eycle and flows through the outside heat recovery fluid of the heat recovery fluid loop side 4b of heat recovery heat exchanger 4.The outside heat recovery fluid of heating may be used for such as heating building and/or providing hot water.
Depend on the amount of the heat being delivered to outside heat recovery fluid from circulating refrigerant, cold-producing medium at least partially can in heat recovery heat exchanger 4 or its condensed downstream.Therefore, refrigerant liquid admixture of gas is present in the outlet line 7 of refrigerant loop side 4b of heat recovery heat exchanger 4.
But, the liquid refrigerant entering gas cooler/condenser 10 will reduce the performance of gas cooler/condenser 10, and when gas cooler/condenser 10 be arranged on significantly higher horizontal plane place, namely relative to the miscellaneous part of refrigerating circuit 1 at the vertical range d place up to 20m time, the liquid component of cold-producing medium may not transfer to the outlet side of gas cooler/condenser 10 completely, and this will reduce performance and the efficiency of refrigerating circuit 1 further.
Therefore, provide gas/liquid separation device 8 in the 4b downstream, refrigerant loop side of heat recovery heat exchanger 4, the liquid part leaving the cold-producing medium of heat recovery heat exchanger 4 to be separated with its gas componant.
Fig. 2 illustrates the zoomed-in view of this gas/liquid separation device 8.
Gas/liquid separation device 8 can be formed by the container or pipeline compared with the outlet line 7 (it also forms the suction line 7 of gas/liquid separation device 8) of heat recovery heat exchanger 4 with significantly larger cross section/diameter, significantly to reduce the speed of cold-producing medium, thus the liquid component of cold-producing medium is allowed to be separated with the gas componant of cold-producing medium and to be gathered in the 8a place, bottom of gas/liquid separation device 8.In an exemplary embodiment, the cross section of gas/liquid separation device 8 or larger than the diameter of outlet line 7 four to five times of diameter, and the speed of cold-producing medium from the about 9m/s in the exit at compressor 2a, 2b, 2c, 2d be decreased in the container or pipeline of gas/liquid separation device 8 about 0,3m/s.
The gas componant of cold-producing medium leaves gas/liquid separation device 8 by the gaseous phase outlet pipeline 9 of gas/liquid separation device 8, and the top 8b of gas/liquid separation device 8 is fluidly connected to the entrance side of gas cooler/condenser 10 by described gaseous phase outlet pipeline 9.The gas componant of cold-producing medium is cooled and/or condensation by gas in gas cooler/condenser 10, undertaken expanding by the high pressure expansion gear 12 being fluidly connected to the outlet side of gas cooler/condenser 10 and be delivered in receiver 14, described receiver 14 is fluidly connected to the outlet side of high pressure expansion gear 12.
The liquid-phase outlet pipeline 13 of gas/liquid separation device 8 is fluidly connected to the bottom 8a of gas/liquid separation device 8, thus allows the liquid refrigerant at the 8a place, bottom being gathered in gas/liquid separation device 8 to transfer in receiver 14.
At least one switchable valve 24 is arranged in liquid-phase outlet pipeline 13, thus allows the fluid optionally opened and closed between gas/liquid separation device 8 with receiver 14 to be connected.
Gas/liquid separation device 8 is further provided with liquid level sensor 26, and described liquid level sensor 26 is arranged to the horizontal plane that sensing is collected in the liquid refrigerant at the 8a place, bottom of gas/liquid separation device 8.Liquid level sensor 26 is functionally connected to control unit 28, described control unit 28 is arranged to: when being collected in the horizontal plane of the liquid refrigerant in gas/liquid separation device 8 more than opening at least one switchable valve 24 during the first predetermined level, and when being collected in the horizontal plane of the liquid refrigerant in gas/liquid separation device 8 lower than closing at least one switchable valve 24 during the second predetermined level, described second predetermined level is equal to or less than the first predetermined level.Close at least one switchable valve 24 to avoid: if the horizontal plane being collected in the liquid refrigerant at the 8a place, bottom of gas/liquid separation device 8 is too low so that allow gas refrigerant to enter liquid-phase outlet pipeline 13, gas refrigerant can walk around gas cooler/condenser 10 by liquid-phase outlet pipeline 13.
Liquid level sensor 26 can be machinery or dynamo-electric embedded fluid indicator or electronic horizon face sensor.
In the first embodiment, switchable valve 24 can be simple close/open valve, only has closed condition and single open mode.
In an alternative embodiment, switchable valve 24 can have two or more different open modes, to provide at least two different opening cross-section, thus allows to regulate more accurately the liquid refrigerant from gas/liquid separation device 8 to receiver to flow.In another embodiment, the opening cross-section of switchable valve 24 can be controlled continuously, to allow the liquid refrigerant flowing controlling more subtly to leave gas/liquid separation device 8.
In still another embodiment, at least one extra switchable valve 25 is parallel-connected to switchable valve 24.Two or more switchable valve 24,25 be connected in parallel are provided to allow by optionally opening the one or more amounts controlling the liquid refrigerant of eluting gas/liquid separator 8 in described switchable valve 24,25.Switchable valve 24,25 can have identical or different opening cross-section (Kv value).
In one embodiment, refrigerating circuit comprises at least one switchable valve being arranged to the liquid outlet optionally opening and closing gas/liquid separation device.Refrigerating circuit also comprises: liquid level sensor, and described liquid level sensor is arranged to the amount detecting the liquid refrigerant be present in gas/liquid separation device; And control unit, the amount that described control unit is arranged to based on the liquid refrigerant detected by liquid level sensor operates at least one switchable valve.Control unit can combine with liquid level sensor or switchable valve, or can be provided as unit separately.
Horizontal plane based on the liquid refrigerant be collected in gas/liquid separation device controls at least one switchable valve and allows liquid refrigerant to flow to receiver from gas/liquid separation device, but is that of avoiding gas refrigerant and walks around gas cooler/condenser and flow to receiver from gas/liquid separation device.
In one embodiment, switchable valve can switch between open modes different from least two kinds in off position.The switchable valve with at least two kinds of different open modes is provided to allow to control more accurately from gas/liquid separation device to the liquid refrigerant flowing receiver.In one embodiment, can control switchable valve continuously, this allows to control more subtly from gas/liquid separation device to the liquid refrigerant flowing receiver.
In one embodiment, refrigerating circuit comprises at least two switchable valve be connected in parallel.The one or more permission optionally opened and closed at least two switchable valve controls more accurately from gas/liquid separation device to the liquid refrigerant flowing receiver.Switchable valve can have identical or different opening cross-section/Kv value.The switchable valve with different opening cross-section/Kv value is provided to provide additional option for regulating flow of refrigerant.
In one embodiment, at least one gas cooler/condenser is arranged in the horizontal plane place of the horizontal plane higher than heat recovery heat exchanger, to improve the air flowing flowing through gas cooler/condenser, this will strengthen the gas cooling capacity of gas cooler/condenser.Particularly, gas cooler/condenser can be arranged in horizontal plane higher than heat recovery heat exchanger up to about the position of 20 meters, such as, on the building top holding refrigerating circuit.
In one embodiment, refrigerating circuit comprises at least one extra (high pressure) expansion gear be fluidly connected between gas cooler/condenser and receiver, to be combined with the expansion gear that the evaporimeter being arranged in vaporizer upstream associates and to provide compound expansion, thus improve performance and the efficiency of refrigerating circuit.
In one embodiment, refrigerating circuit comprises the flash gas bypass line upper part of receiver being fluidly connected to the entrance side of at least one compressor.Flash gas expansion gear can be arranged in flash gas bypass line.By-pass line also can comprise the flash gas heat exchanger being arranged in flash gas expansion device downstream, and described flash gas heat exchanger is arranged to flash gas and the heat exchange of cold-producing medium flowing to evaporimeter from receiver.This flash gas bypass line can contribute to the performance and the efficiency that improve refrigerating circuit.
In one embodiment, at least one compressor is configured to variable speed compressor, thus allows to control by the speed controlling described compressor the cooling capacity that provided by refrigerating circuit.
Although describe the present invention with reference to exemplary, it will be understood by those skilled in the art that without departing from the scope of the invention, various change can be made and equivalent can be used to carry out its element alternative.In addition, when not departing from base region of the present invention, many amendments can be made and adapt to religious doctrine of the present invention to make concrete condition or material.Therefore, the present invention is not intended to be limited to disclosed specific embodiments, but the present invention will comprise all embodiments fallen within the scope of appended claims.
Reference numeral
1 refrigerating circuit
2 compressor bank
2a, 2b, 2c, 2d compressor
4 heat recovery heat exchanger
The refrigerant loop side of 4a heat recovery heat exchanger
The side, heat recovery fluid loop of 4b heat recovery heat exchanger
6 heat recovery fluid loops
The outlet line of the suction line/heat recovery heat exchanger of 7 gas/liquid separation devices
8 gas/liquid separation devices
The bottom of 8a gas/liquid separation device
The top of 8b gas/liquid separation device
The gaseous phase outlet pipeline of 9 gas/liquid separation devices
10 gas cooler/condenser
12 high pressure expansion gears
The liquid-phase outlet pipeline of 13 gas/liquid separation devices
14 receivers
The upper part of 14a receiver
16 flash gas heat exchangers
The expansion gear of 18 evaporimeter associations
20 evaporimeters
21 flash gas bypass line
22 flash gas expansion gears
24 switchable valve
25 extra switchable valve
26 liquid level sensors
28 control units.
Claims (15)
1. refrigeration loop (1), it is arranged to and makes refrigerant cycle, and comprises on the flow direction of described refrigerant:
At least one compressor (2a, 2b, 2c, 2d);
At least one heat recovery heat exchanger (4);
Gas/liquid separation device (8);
At least one gas cooler/condenser (10);
Receiver (14); And
At least one evaporimeter (20), the expansion gear (18) of wherein at least one evaporimeter association is fluidly connected to described at least one evaporimeter (20) upstream;
Wherein said gas/liquid separation device (8) comprises
Refrigerant inlet line (7), described refrigerant inlet line (7) is fluidly connected to the outlet side of described at least one heat recovery heat exchanger (4);
Gaseous phase outlet pipeline (9), described gaseous phase outlet pipeline (9) is fluidly connected to the entrance side of described at least one gas cooler/condenser (10); And
Liquid-phase outlet pipeline (13), described liquid-phase outlet pipeline (13) is fluidly connected to described receiver (14).
2. refrigeration loop (1) as claimed in claim 1, it also comprises at least one switchable valve (24), and described at least one switchable valve (24) is arranged to the described liquid-phase outlet pipeline (13) optionally opening and closing described gas/liquid separation device (8).
3. refrigeration loop (1) as claimed in claim 2, it also comprises: liquid level sensor (26), and described liquid level sensor (26) is arranged to the amount that detection is present in the liquid refrigerant in described gas/liquid separation device (8); And control unit (28), the described amount that described control unit (28) is arranged to based on the liquid refrigerant detected by described liquid level sensor (26) operates described at least one switchable valve (24).
4. refrigeration loop (1) as claimed in claim 2 or claim 3, wherein said switchable valve (24) can switch between open modes different from least two kinds in off position.
5. the refrigeration loop (1) according to any one of claim 2 to 4, it comprises at least two switchable valve (24,25) be connected in parallel.
6., as refrigeration loop in any one of the preceding claims wherein (1), wherein said at least one gas cooler/condenser (10) is arranged in the horizontal plane place of the horizontal plane higher than described heat recovery heat exchanger (4).
7., as refrigeration loop in any one of the preceding claims wherein (1), it comprises at least one the high pressure expansion gear (12) be fluidly connected between described gas cooler/condenser (10) and described receiver (14).
8., as refrigeration loop in any one of the preceding claims wherein (1), it comprises the flash gas bypass line (21) of the entrance side upper part of described receiver (14) being fluidly connected to described at least one compressor (2a, 2b, 2c, 2d).
9. refrigeration loop (1) as claimed in claim 8, wherein flash gas expansion gear (22) is arranged in described flash gas bypass line (21).
10. refrigeration loop (1) as claimed in claim 9, wherein said flash gas bypass line (21) comprises flash gas heat exchanger (16), and described flash gas heat exchanger (16) is arranged in described flash gas expansion gear (22) downstream and is arranged to described flash gas and the heat exchange of cold-producing medium flowing to described evaporimeter (20) from described receiver (14).
The method of 11. operations refrigerating circuit (1), it comprises the following steps:
Cold-producing medium is compressed;
Recuperation of heat between the cold-producing medium of described compression and outside heat recovery fluid heat exchange is provided;
The cold-producing medium of described compression is divided into gas componant and liquid component, wherein
Cooled and/or the condensation of described gas componant and be delivered in receiver (14); And
Described liquid component is directly delivered in described receiver (14); And
The liquefied refrigerant obtained from described receiver (14) is made to expand and evaporate.
12. methods operating refrigerating circuit (1) as claimed in claim 11, the step that the wherein said cold-producing medium by described compression is divided into gas componant and liquid component performs in gas/liquid separation device (8), and described liquid component is collected in described gas/liquid separation device (8) and described method also comprises the step of the amount determining the liquid refrigerant be collected in described gas/liquid separation device (8).
13. methods operating refrigerating circuit (1) as claimed in claim 12, wherein said method is further comprising the steps of: when the liquid level being collected in the liquid refrigerant in described gas/liquid separation device (8) exceedes predetermined level, liquid refrigerant is transferred to described receiver (14) from described gas/liquid separation device (8).
The method of 14. operation refrigerating circuits (1) according to any one of claim 11 to 13, it is further comprising the steps of
To shunt from the gas refrigerant of described receiver (14);
The gas refrigerant of described shunting is expanded; And/or
Heat exchange between the liquid refrigerant providing the shunt gas cold-producing medium of described expansion and send from described receiver (14).
The method of 15. operation refrigerating circuits (1) according to any one of claim 11 to 14, wherein said cooling and/or the cold-producing medium of condensation partly expanded before being delivered in described receiver (14).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2013/069510 WO2015039688A1 (en) | 2013-09-19 | 2013-09-19 | Refrigeration circuit with heat recovery module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105556220A true CN105556220A (en) | 2016-05-04 |
| CN105556220B CN105556220B (en) | 2019-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380079723.9A Expired - Fee Related CN105556220B (en) | 2013-09-19 | 2013-09-19 | Refrigerating circuit with heat recovery module |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20160231040A1 (en) |
| EP (2) | EP3086057B1 (en) |
| CN (1) | CN105556220B (en) |
| DK (2) | DK3086057T3 (en) |
| RU (1) | RU2659679C2 (en) |
| WO (1) | WO2015039688A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6188918B2 (en) * | 2014-03-14 | 2017-08-30 | 三菱電機株式会社 | Refrigeration equipment |
| CN105899884B (en) * | 2014-03-20 | 2018-12-14 | 三菱电机株式会社 | Heat source side unit and air-conditioning device |
| EP3023712A1 (en) * | 2014-11-19 | 2016-05-25 | Danfoss A/S | A method for controlling a vapour compression system with a receiver |
| DK3256798T3 (en) * | 2015-02-09 | 2023-03-06 | Carrier Corp | COOLING AND HEATING SYSTEM |
| CN107850356B (en) * | 2015-07-01 | 2020-12-08 | 特灵空调系统(中国)有限公司 | Heat recovery system with liquid separator application |
| US11060767B2 (en) * | 2015-11-05 | 2021-07-13 | Danfoss A/S | Method for switching compressor capacity |
| CN109073281B (en) * | 2016-04-18 | 2021-05-25 | 江森自控科技公司 | Condenser evaporator system with subcooler for refrigeration system |
| PL3628942T3 (en) | 2018-09-25 | 2021-10-04 | Danfoss A/S | A method for controlling a vapour compression system at a reduced suction pressure |
| EP3628940B1 (en) | 2018-09-25 | 2022-04-20 | Danfoss A/S | A method for controlling a vapour compression system based on estimated flow |
| CN111637667B (en) * | 2019-03-01 | 2022-02-11 | 浙江盾安机电科技有限公司 | Economizer and heat transfer system |
| US11112147B2 (en) | 2019-10-24 | 2021-09-07 | M.D, Mechanical Devices Ltd. | Cooling system with controlled biphase mixing of refrigerant |
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| WO2013004298A1 (en) * | 2011-07-05 | 2013-01-10 | Carrier Corporation | Refrigeration circuit, gas-liquid separator and heating and cooling system |
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| RU2208748C1 (en) * | 2002-01-21 | 2003-07-20 | Государственное общеобразовательное учреждение Дальневосточный государственный технический рыбохозяйственный университет | Refrigerating plant |
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2013
- 2013-09-19 DK DK16165542.8T patent/DK3086057T3/en active
- 2013-09-19 DK DK13763104.0T patent/DK3047218T3/en active
- 2013-09-19 WO PCT/EP2013/069510 patent/WO2015039688A1/en active Application Filing
- 2013-09-19 CN CN201380079723.9A patent/CN105556220B/en not_active Expired - Fee Related
- 2013-09-19 US US15/022,777 patent/US20160231040A1/en not_active Abandoned
- 2013-09-19 EP EP16165542.8A patent/EP3086057B1/en not_active Not-in-force
- 2013-09-19 RU RU2016115092A patent/RU2659679C2/en active
- 2013-09-19 EP EP13763104.0A patent/EP3047218B1/en active Active
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| JP2003106687A (en) * | 2001-09-27 | 2003-04-09 | Daikin Ind Ltd | Refrigerator |
| JP2006038386A (en) * | 2004-07-29 | 2006-02-09 | Daikin Ind Ltd | Cooling device |
| CN101084409A (en) * | 2004-10-07 | 2007-12-05 | 布鲁克斯自动化有限公司 | Efficient heat exchanger for refrigeration process |
| WO2012168544A1 (en) * | 2011-06-06 | 2012-12-13 | Huurre Group Oy | A multi-evaporator refrigeration circuit |
| WO2013004298A1 (en) * | 2011-07-05 | 2013-01-10 | Carrier Corporation | Refrigeration circuit, gas-liquid separator and heating and cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3047218A1 (en) | 2016-07-27 |
| WO2015039688A1 (en) | 2015-03-26 |
| CN105556220B (en) | 2019-01-22 |
| RU2659679C2 (en) | 2018-07-03 |
| US20160231040A1 (en) | 2016-08-11 |
| EP3086057A1 (en) | 2016-10-26 |
| DK3086057T3 (en) | 2018-09-17 |
| EP3086057B1 (en) | 2018-06-13 |
| DK3047218T3 (en) | 2021-07-05 |
| RU2016115092A (en) | 2017-10-24 |
| EP3047218B1 (en) | 2021-04-28 |
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